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PI: Bev Law - Oregon State University
PI: Chad Hanson - Oregon State University
Lat, Long: 44.4992, -121.6224
Elevation(m): 922
Network Affiliations: AmeriFlux
Vegetation IGBP: ENF (Evergreen Needleleaf Forests: Lands dominated by woody vegetation with a percent cover >60% and height exceeding 2 meters. Almost all trees remain green all year. Canopy is never without green foliage.)
Climate Koeppen: Csb (Mediterranean: mild with dry, warm summer)
Mean Annual Temp (°C): 7.61
Mean Annual Precip. (mm): 1038.82
Flux Species Measured: CO2, H2O
Years Data Collected: 1996 - 2000
Years Data Available:

AmeriFlux BASE 1996 - 2000   Data Citation

Data Use Policy:AmeriFlux Legacy Policy
The site is located on land designated as a Research Natural Area (RNA). The site is very open, with even-aged stands of old-growth trees, young trees ...
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Research Topics:
The research and science objectives of the Metolius Old Pine site are as follows: 1) To quantify how successional stages and management practices in forest ...
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Acknowledgment: This study was supported by NASA (grant # NAG5-7531), and the Office of Science (BER), U.S. Department of Energy (grant # FG0300ER63014).
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Use the information below for citation of this site. See the Data Policy page for more details.

DOI(s) for citing US-Me4 data

Data Use Policy: AmeriFlux Legacy Policy

  • AmeriFlux BASE:
    Citation: Bev Law (2021), AmeriFlux BASE US-Me4 Metolius-old aged ponderosa pine, Ver. 5-5, AmeriFlux AMP, (Dataset).

To cite BADM when downloaded on their own, use the publications below for citing site characterization. When using BADM that are downloaded with AmeriFlux BASE and AmeriFlux FLUXNET products, use the DOI citation for the associated data product.

Publication(s) for citing site characterization



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Note: Results are the number of downloads to distinct data users. The Download Count column indicates the number of times the data user downloaded the data. The Version column refers to the version of the data product for the site that was downloaded by the data user.

Year Range

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The time series shows the 16-day Normalized Difference Vegetation Index (NDVI) average from the MOD13Q1 data product.
Use the slider below the time series to zoom in and out.

Includes all pixels that have acceptable quality

To view / download these data and other MOD13Q1 products for this site, visit MODIS/Terra Vegetation Indices.

For other related products, visit MODIS/VIIRS Fixed Sites Subsets Tool.


ORNL DAAC. 2018. MODIS and VIIRS Land Products Fixed Sites Subsetting and Visualization Tool. ORNL DAAC, Oak Ridge, Tennessee, USA.

Read more on how to cite these MODIS products. Data come from NASA’s MODIS instruments installed on satellites Terra and Aqua, which scan the entire Earth’s surface every one to two days.

MODIS NDVI subsetted data is not yet available for this site.

For a complete list of AmeriFlux sites, visit ORNL DAAC's MODIS/VIIRS Fixed Sites Subsets Tool.

Year Publication
2021 Chu, H., Luo, X., Ouyang, Z., Chan, W. S., Dengel, S., Biraud, S. C., Torn, M. S., Metzger, S., Kumar, J., Arain, M. A., Arkebauer, T. J., Baldocchi, D., Bernacchi, C., Billesbach, D., Black, T. A., Blanken, P. D., Bohrer, G., Bracho, R., Brown, S., Brunsell, N. A., Chen, J., Chen, X., Clark, K., Desai, A. R., Duman, T., Durden, D., Fares, S., Forbrich, I., Gamon, J. A., Gough, C. M., Griffis, T., Helbig, M., Hollinger, D., Humphreys, E., Ikawa, H., Iwata, H., Ju, Y., Knowles, J. F., Knox, S. H., Kobayashi, H., Kolb, T., Law, B., Lee, X., Litvak, M., Liu, H., Munger, J. W., Noormets, A., Novick, K., Oberbauer, S. F., Oechel, W., Oikawa, P., Papuga, S. A., Pendall, E., Prajapati, P., Prueger, J., Quinton, W. L., Richardson, A. D., Russell, E. S., Scott, R. L., Starr, G., Staebler, R., Stoy, P. C., Stuart-Haëntjens, E., Sonnentag, O., Sullivan, R. C., Suyker, A., Ueyama, M., Vargas, R., Wood, J. D., Zona, D. (2021) Representativeness Of Eddy-Covariance Flux Footprints For Areas Surrounding Ameriflux Sites, Agricultural And Forest Meteorology, 301-302, 108350.
2018 Chu, H., Baldocchi, D. D., Poindexter, C., Abraha, M., Desai, A. R., Bohrer, G., Arain, M. A., Griffis, T., Blanken, P. D., O'Halloran, T. L., Thomas, R. Q., Zhang, Q., Burns, S. P., Frank, J. M., Christian, D., Brown, S., Black, T. A., Gough, C. M., Law, B. E., Lee, X., Chen, J., Reed, D. E., Massman, W. J., Clark, K., Hatfield, J., Prueger, J., Bracho, R., Baker, J. M., Martin, T. A. (2018) Temporal Dynamics Of Aerodynamic Canopy Height Derived From Eddy Covariance Momentum Flux Data Across North American Flux Networks, Geophysical Research Letters, 45, 9275–9287.
2004 Treuhaft, R. N., Law, B. E., Asner, G. P. (2004) Forest Attributes From Radar Interferometric Structure And Its Fusion With Optical Remote Sensing, Bioscience, 54(6), 561-571.[0561:fafris];2
2000 Baldocchi, D. D., Law, B. E., Anthoni, P. M. (2000) On Measuring And Modeling Energy Fluxes Above The Floor Of A Homogeneous And Heterogeneous Conifer Forest, Agricultural And Forest Meteorology, 102(2-3), 187-206.
2002 Davidson, E., Savage, K., Bolstad, P., Clark, D., Curtis, P., Ellsworth, D., Hanson, P., Law, B., Luo, Y., Pregitzer, K., Randolph, J., Zak, D. (2002) Belowground Carbon Allocation In Forests Estimated From Litterfall And IRGA-Based Soil Respiration Measurements, Agricultural And Forest Meteorology, 113(1-4), 39-51.
2002 Falge, E., Baldocchi, D., Tenhunen, J., Aubinet, M., Bakwin, P., Berbigier, P., Bernhofer, C., Burba, G., Clement, R., Davis, K. J., Elbers, J. A., Goldstein, A. H., Grelle, A., Granier, A., Guðmundsson, J., Hollinger, D., Kowalski, A. S., Katul, G., Law, B. E., Malhi, Y., Meyers, T., Monson, R. K., Munger, J., Oechel, W., Paw U, K. T., Pilegaard, K., Rannik, Ü., Rebmann, C., Suyker, A., Valentini, R., Wilson, K., Wofsy, S. (2002) Seasonality Of Ecosystem Respiration And Gross Primary Production As Derived From FLUXNET Measurements, Agricultural And Forest Meteorology, 113(1-4), 53-74.
2005 Arain, M. A., Restrepo-Coupe, N. (2005) Net Ecosystem Production In A Temperate Pine Plantation In Southeastern Canada, Agricultural And Forest Meteorology, 128(3-4), 223-241.
2005 Campbell, J., Law, B. (2005) Forest Soil Respiration Across Three Climatically Distinct Chronosequences In Oregon, Biogeochemistry, 73(1), 109-125.
2004 Sun, O. J., Campbell, J., Law, B. E., Wolf, V. (2004) Dynamics Of Carbon Stocks In Soils And Detritus Across Chronosequences Of Different Forest Types In The Pacific Northwest, USA, Global Change Biology, 10(9), 1470-1481.
2004 Irvine, J., Law, B. E., Kurpius, M. R., Anthoni, P. M., Moore, D., Schwarz, P. A. (2004) Age-Related Changes In Ecosystem Structure And Function And Effects On Water And Carbon Exchange In Ponderosa Pine, Tree Physiology, 24(7), 753-763.
2005 Warren, J., Meinzer, F., Brooks, J., Domec, J. (2005) Vertical Stratification Of Soil Water Storage And Release Dynamics In Pacific Northwest Coniferous Forests, Agricultural And Forest Meteorology, 130(1-2), 39-58.
2002 Bowling, D., McDowell, N., Bond, B., Law, B., Ehleringer, J. (2002) C-13 Content Of Ecosystem Respiration Is Linked To Precipitation And Vapor Pressure Deficit, Oecologia, 131(1), 113-124.
2003 Reichstein, M., Rey, A., Freibauer, A., Tenhunen, J., Valentini, R., Banza, J., Casals, P., Cheng, Y., Grünzweig, J. M., Irvine, J., Joffre, R., Law, B. E., Loustau, D., Miglietta, F., Oechel, W., Ourcival, J., Pereira, J. S., Peressotti, A., Ponti, F., Qi, Y., Rambal, S., Rayment, M., Romanya, J., Rossi, F., Tedeschi, V., Tirone, G., Xu, M., Yakir, D. (2003) Modeling Temporal And Large-Scale Spatial Variability Of Soil Respiration From Soil Water Availability, Temperature And Vegetation Productivity Indices, Global Biogeochemical Cycles, 17(4), n/a-n/a.
2004 McDowell, N. G., Bowling, D. R., Schauer, A., Irvine, J., Bond, B. J., Law, B. E., Ehleringer, J. R. (2004) Associations Between Carbon Isotope Ratios Of Ecosystem Respiration, Water Availability And Canopy Conductance, Global Change Biology, 10(10), 1767-1784.
2001 Williams, M., Law, B. E., Anthoni, P. M., Unsworth, M. H. (2001) Use Of A Simulation Model And Ecosystem Flux Data To Examine Carbon-Water Interactions In Ponderosa Pine, Tree Physiology, 21(5), 287-298.
2004 Turner, D. P., Guzy, M., Lefsky, M. A., Ritts, W. D., Van Tuyl, S., Law, B. E. (2004) Monitoring Forest Carbon Sequestration With Remote Sensing And Carbon Cycle Modeling, Environmental Management, 33(4), 457-466.
1999 Law, B., Baldocchi, D., Anthoni, P. (1999) Below-Canopy And Soil CO2 Fluxes In A Ponderosa Pine Forest, Agricultural And Forest Meteorology, 94(3-4), 171-188.
1995 Law, B. E. (1995) Estimation Of Leaf Area Index And Light Intercepted By Shrubs From Digital Videography, Remote Sensing Of Environment, 51(2), 276-280.
2000 Ryan, M. G., Bond, B. J., Law, B. E., Hubbard, R. M., Woodruff, D., Cienciala, E., Kucera, J. (2000) Transpiration And Whole-Tree Conductance In Ponderosa Pine Trees Of Different Heights, Oecologia, 124(4), 553-560.
2001 Law, B., Van Tuyl, S., Cescatti, A., Baldocchi, D. (2001) Estimation Of Leaf Area Index In Open-Canopy Ponderosa Pine Forests At Different Successional Stages And Management Regimes In Oregon, Agricultural And Forest Meteorology, 108(1), 1-14.
2003 Law, B. E., Sun, O. J., Campbell, J., Van Tuyl, S., Thornton, P. E. (2003) Changes In Carbon Storage And Fluxes In A Chronosequence Of Ponderosa Pine, Global Change Biology, 9(4), 510-524.
2001 Law, B. E., Cescatti, A., Baldocchi, D. D. (2001) Leaf Area Distribution And Radiative Transfer In Open-Canopy Forests: Implications For Mass And Energy Exchange, Tree Physiology, 21(12-13), 777-787.
2005 Hibbard, K. A., Law, B. E., Reichstein, M., Sulzman, J. (2005) An Analysis Of Soil Respiration Across Northern Hemisphere Temperate Ecosystems, Biogeochemistry, 73(1), 29-70.
2002 Irvine, J., Law, B. E. (2002) Contrasting Soil Respiration In Young And Old-Growth Ponderosa Pine Forests, Global Change Biology, 8(12), 1183-1194.
2001 Law, B., Thornton, P., Irvine, J., Anthoni, P., Van Tuyl, S. (2001) Carbon Storage And Fluxes In Ponderosa Pine Forests At Different Developmental Stages, Global Change Biology, 7(7), 755-777.
2002 Irvine, J., Law, B. E., Anthoni, P. M., Meinzer, F. C. (2002) Water Limitations To Carbon Exchange In Old-Growth And Young Ponderosa Pine Stands, Tree Physiology, 22(2-3), 189-196.
2003 Bowling, D. R., McDowell, N. G., Welker, J. M., Bond, B. J., Law, B. E., Ehleringer, J. R. (2003) Oxygen Isotope Content Of CO2 In Nocturnal Ecosystem Respiration: 1. Observations In Forests Along A Precipitation Transect In Oregon, USA, Global Biogeochemical Cycles, 17(4), n/a-n/a.
2003 Turner, D. P., Guzy, M., Lefsky, M. A., Van Tuyl, S., Sun, O., Daly, C., Law, B. E. (2003) Effects Of Land Use And Fine-Scale Environmental Heterogeneity On Net Ecosystem Production Over A Temperate Coniferous Forest Landscape, Tellus Series B-Chemical and Physical Meteorology, 55(2), 657-668.
2006 Aranibar, J. N., Berry, J. A., Riley, W. J., Pataki, D. E., Law, B. E., Ehleringer, J. R. (2006) Combining Meteorology, Eddy Fluxes, Isotope Measurements, And Modeling To Understand Environmental Controls Of Carbon Isotope Discrimination At The Canopy Scale, Global Change Biology, 12(4), 710-730.
2004 Schwarz, P. A., Law, B. E., Williams, M., Irvine, J., Kurpius, M., Moore, D. (2004) Climatic Versus Biotic Constraints On Carbon And Water Fluxes In Seasonally Drought-Affected Ponderosa Pine Ecosystems, Global Biogeochemical Cycles, 18(GB4007), n/a-n/a.
2000 Law, B. E., Waring, R., Anthoni, P. M., Aber, J. D. (2000) Measurements Of Gross And Net Ecosystem Productivity And Water Vapour Exchange Of A Pinus Ponderosa Ecosystem, And An Evaluation Of Two Generalized Models, Global Change Biology, 6(2), 155-168.
2003 Bowling, D. R., McDowell, N. G., Welker, J. M., Bond, B. J., Law, B. E., Ehleringer, J. R. (2003) Oxygen Isotope Content Of CO2 in Nocturnal Ecosystem Respiration: 2. Short-Term Dynamics Of Foliar And Soil Component Fluxes In An Old-Growth Ponderosa Pine Forest, Global Biogeochemical Cycles, 17(4), n/a-n/a.
2001 Law, B. E., Goldstein, A. H., Anthoni, P. M., Unsworth, M. H., Panek, J. A., Bauer, M. R., Fracheboud, J. M., Hultman, N. (2001) Carbon Dioxide And Water Vapor Exchange By Young And Old Ponderosa Pine Ecosystems During A Dry Summer, Tree Physiology, 21(5), 299-308.
2005 Turner, D. P., Ritts, W. D., Cohen, W. B., Maeirsperger, T. K., Gower, S. T., Kirschbaum, A. A., Running, S. W., Zhao, M., Wofsy, S. C., Dunn, A. L., Law, B. E., Campbell, J. L., Oechel, W. C., Kwon, H. J., Meyers, T. P., Small, E. E., Kurc, S. A., Gamon, J. A. (2005) Site-Level Evaluation Of Satellite-Based Global Terrestrial Gross Primary Production And Net Primary Production Monitoring, Global Change Biology, 11(4), 666-684.
2004 Law, B. E., Turner, D., Campbell, J., Sun, O. J., Van Tuyl, S., Ritts, W. D., Cohen, W. B. (2004) Disturbance And Climate Effects On Carbon Stocks And Fluxes Across Western Oregon USA, Global Change Biology, 10(9), 1429-1444.
2004 Campbell, J. L., Sun, O. J., Law, B. E. (2004) Supply-Side Controls On Soil Respiration Among Oregon Forests, Global Change Biology, 10(11), 1857-1869.
2002 Anthoni, P. M., Unsworth, M. H., Law, B. E., Irvine, J., Baldocchi, D. D., Tuyl, S. V., Moore, D. (2002) Seasonal Differences In Carbon And Water Vapor Exchange In Young And Old-Growth Ponderosa Pine Ecosystems, Agricultural And Forest Meteorology, 111(3), 203-222.
2004 Campbell, J. L., Sun, O. J., Law, B. E. (2004) Disturbance And Net Ecosystem Production Across Three Climatically Distinct Forest Landscapes, Global Biogeochemical Cycles, 18(4), n/a-n/a.
2005 Van Tuyl, S., Law, B., Turner, D., Gitelman, A. (2005) Variability In Net Primary Production And Carbon Storage In Biomass Across Oregon Forests—An Assessment Integrating Data From Forest Inventories, Intensive Sites, And Remote Sensing, Forest Ecology And Management, 209(3), 273-291.
2004 Bond-Lamberty, B., Wang, C., Gower, S. T. (2004) A Global Relationship Between The Heterotrophic And Autotrophic Components Of Soil Respiration?, Global Change Biology, 10(10), 1756-1766.
2004 McDowell, N. G., Bowling, D. R., Bond, B. J., Irvine, J., Law, B. E., Anthoni, P., Ehleringer, J. R. (2004) Response Of The Carbon Isotopic Content Of Ecosystem, Leaf, And Soil Respiration To Meteorological And Physiological Driving Factors In A Pinus Ponderosa Ecosystem, Global Biogeochemical Cycles, 18(1), n/a-n/a.
2004 Kelliher, F., Ross, D., Law, B., Baldocchi, D., Rodda, N. (2004) Limitations To Carbon Mineralization In Litter And Mineral Soil Of Young And Old Ponderosa Pine Forests, Forest Ecology And Management, 191(1-3), 201-213.
2006 F. A. Heinsch, M. S. Zhao, S. W. Running, J. S. Kimball, R. R. Nemani, K. J. Davis, P. V. Bolstad, B. D. Cook, A. R. Desai, D. M. Ricciuto, B. E. Law, W. C. Oechel, H. Kwon, H. Luo, S. C. Wofsy, A. L. Dunn, J. W. Munger, D. D. Baldocchi, L. Xu, D. Y. Hollinger, A. D. Richardson, P. C. Stoy, M. B. S. Siqueira, R. K. Monson, S. P. Burns, L. B. Flanagan (2006) Evaluation Of Remote Sensing Based Terrestrial Productivity From MODIS Using Regional Tower Eddy Flux Network Observations, IEEE Transactions On Geoscience And Remote Sensing, 44(7), 1908-1925.
1999 Anthoni, P. M., Law, B. E., Unsworth, M. H. (1999) Carbon And Water Vapor Exchange Of An Open-Canopied Ponderosa Pine Ecosystem, Agricultural And Forest Meteorology, 95(3), 151-168.
1999 Law, B. E., Ryan, M. G., Anthoni, P. M. (1999) Seasonal And Annual Respiration Of A Ponderosa Pine Ecosystem, Global Change Biology, 5(2), 169-182.
2005 Coops, N. C., Waring, R. H., Law, B. E. (2005) Assessing The Past And Future Distribution And Productivity Of Ponderosa Pine In The Pacific Northwest Using A Process Model, 3-Pg, Ecological Modelling, 183(1), 107-124.

BADM for This Site

Access the Biological, Ancillary, Disturbance and Metadata (BADM) information and data for this site.

BADM contain information for many uses, such as characterizing a site’s vegetation and soil, describing disturbance history, and defining instrumentation for flux processing. They complement the flux/met data.

* Online updates are shown on the Overview tab real time. However, downloaded BADM files will not reflect those updates until they have been reviewed for QA/QC.

Wind Roses

Click an image below to enlarge it, or use the navigation panel.
  • Image scale: 724m x 724m
  • Data Collected:
  • Wind roses use variables ‘WS’ and ‘WD’.
    Download Data Download Wind Rose as Image File (PNG)

    Wind Speed (m/s)

  • Graph Type
  • Wind Speed Scale
  • Wind Direction Scale (%)
  • Show Satellite Image
  • Show Wind Rose
  • Annual Average
    About Ameriflux Wind Roses
    Wind Rose Explanation
    wind rose gives a succinct view of how wind speed and direction are typically distributed at a particular location. Presented in a circular format, a wind rose shows the frequency and intensity of winds blowing from particular directions. The length of each “spoke” around the circle indicates the amount of time (frequency) that the wind blows from a particular direction. Colors along the spokes indicate categories of wind speed (intensity). Each concentric circle represents a different frequency, emanating from zero at the center to increasing frequencies at the outer circles
    This information can be useful to gain insight into regions surrounding a flux tower that contribute to the measured fluxes, and how those regions change in dependence of the time of day and season. The wind roses presented here are for four periods of the year, and in 16 cardinal directions. Graphics are available for all sites in the AmeriFlux network based on reported wind measurements at each site.
    Data from each site can be downloaded by clicking the ‘download’ button.
    Hover the cursor over a wind rose to obtain directions, speeds and intensities.
    Note that wind roses are not equivalent to flux footprints. Specifically, the term flux footprint describes an upwind area “seen” by the instruments measuring vertical turbulent fluxes, such that heat, water, gas and momentum transport generated in this area is registered by the instruments. Wind roses, on the other hand, identify only the direction and speed of wind.
    Where do these data come from?
    The wind roses are based on observed hourly data from the sites registered with the AmeriFlux Network.
    Parameters for AmeriFlux Wind Roses
    To use wind roses for a single AmeriFlux site, the following parameters may be most useful:
    • Wind Speed Scale: Per Site
    • Wind Direction Scale (%): Per Site
    To compare wind roses from more than one single AmeriFlux site, the following parameters may be most useful:
    • Wind Speed Scale: Non-Linear
    • Wind Direction Scale (%): AmeriFlux
    Mar - Jun; 6am - 6pm
    Mar - Jun; 6pm - 6am
    Jun - Sep; 6am - 6pm
    Jun - Sep; 6pm - 6am
    Sep - Dec; 6am - 6pm
    Sep - Dec; 6pm - 6am
    Dec - Mar; 6am - 6pm
    Dec - Mar; 6pm - 6am